Papers
Live trends in quantum computing research, updated daily from arXiv.
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13,393 papers in 12 months (-22% vs prior quarter)
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Qubit Platforms
Hardware platform mentions in abstracts — Photonic leads
Borrowing Dirty Qubits in Quantum Programs
Bonan Su, Li Zhou, Yuan Feng +1 more·Aug 24, 2025
Dirty qubits are ancillary qubits that can be borrowed from idle parts of a computation, enabling qubit reuse and reducing the demand for fresh, clean qubits---a resource that is typically scarce in practice. For such reuse to be valid, the initial s...
Optimal Circuit Size for Fixed-Hamming-Weight Quantum States Preparation
Jingquan Luo, L. Li·Aug 24, 2025
We study the problem of efficiently preparing fixed-Hamming-weight (HW-$k$) quantum states, which are superpositions of $n$-qubit computational basis states with exactly $k$ ones. We present a quantum circuit construction that prepares any $n$-qubit ...
Distributed Implementation of Variational Quantum Eigensolver to Solve QUBO Problems
Milad Hasanzadeh, Amin Kargarian·Aug 24, 2025
We present a distributed algorithm and implementation of the variational quantum eigensolver (VQE), termed distributed VQE (DVQE). DVQE, provided as an open-source Python package, enables the execution of parameterized quantum circuits across multipl...
Quantum Speed Limits For Open System Dynamics Based On A Representation-Basis-Dependent $\boldsymbol{\ell^{p}_{w}}$-Seminorm
H. F. Chau, Jinjie Li·Aug 23, 2025
We report a family of quantum speed limits (QSLs) that give evolution time lower bounds between an initial and a final state whose separation is described by a certain representation basis dependent norm derived from the weighted $\ell^{p}_{w}$-semin...
Quantum State Fidelity for Functional Neural Network Construction
Sk Chan, W. Smith, Kyla Gabriel·Aug 23, 2025
Neuroscientists face challenges in analyzing high-dimensional neural recording data of dense functional networks. Without ground-truth reference data, finding the best algorithm for recovering neurologically relevant networks remains an open question...
Quantum Resource Management in the NISQ Era: Challenges, Vision, and a Runtime Framework
Marcos Guillermo Lammers, Federico Hern'an Holik, A. Fern'andez·Aug 23, 2025
Quantum computers represent a radical technological advancement in the way information is processed by using the principles of quantum mechanics to solve very complex problems that exceed the capabilities of classical systems. However, in the current...
Optimized quantum algorithms for simulating the Schwinger effect
Angus Kan, Jessica Lemieux, Olga Okrut +1 more·Aug 22, 2025
The Schwinger model, which describes lattice quantum electrodynamics in $1+1$ space-time dimensions, provides a valuable framework to investigate fundamental aspects of quantum field theory, and a stepping stone towards non-Abelian gauge theories. Sp...
Improving Quantum Recurrent Neural Networks with Amplitude Encoding
Jack Morgan, Hamed Mohammadbagherpoor, Eric Ghysels·Aug 22, 2025
Quantum machine learning holds promise for advancing time series forecasting. The Quantum Recurrent Neural Network (QRNN), inspired by classical RNNs, encodes temporal data into quantum states that are periodically input into a quantum circuit. While...
Optimal Hamiltonian for a quantum state with finite entropy
M. E. Shirokov·Aug 22, 2025
We consider the following task: how for a given quantum state $ρ$ to find a grounded Hamiltonian $H$ satisfying the condition $\mathrm{Tr} Hρ\leq E_0<+\infty$ in such a way that the von Neumann entropy of the Gibbs state $γ_H(E)$ corresponding to a g...
Decoherent histories with(out) objectivity in a (broken) apparatus
Benoît Ferté, Davide Farci, Xiangyu Cao·Aug 22, 2025
We characterize monitored quantum dynamics in a solvable model exhibiting a phase transition between a measurement apparatus and a scrambler. We show that approximate decoherent histories emerge in both phases with respect to a coarse-grained extensi...
Modeling of Far-Field Quantum Coherence by Dielectric Bodies Based on the Volume Integral Equation Method
Chengnian Huang, Hangyu Ge, Yijia Cheng +3 more·Aug 22, 2025
The Hong-Ou-Mandel (HOM) effect is a hallmark of nonclassical two-photon interference. This paper develops a unified theory-numerics framework to compute angle-resolved far-field two-photon correlations from arbitrary lossless dielectric scatterers. ...
Quantum Fisher information as a witness of non-Markovianity and criticality in the spin-boson model
Daniele Parlato, Grazia Di Bello, Fabrizio Pavan +2 more·Aug 22, 2025
The quantum Fisher information, the quantum analogue of the classical Fisher information, is a central quantity in quantum metrology and quantum sensing due to its connection to parameter estimation and fidelity susceptibility. Using numerically exac...
Parrondo paradox in quantum image encryption
Łukasz Pawela·Aug 22, 2025
We present a quantum image encryption protocol that harnesses discrete-time quantum walks (DTQWs) on cycles and explicitly examines the role of the Parrondo paradox in security. Using the NEQR representation, a DTQW-generated probability mask is tran...
Robust Control and Entanglement of Qudits in Neutral Atom Arrays
Amir Burshtein, Shachar Fraenkel, Moshe Goldstein +1 more·Aug 22, 2025
Quantum devices comprised of elementary components with more than two stable levels - so-called qudits - enrich the accessible Hilbert space, enabling applications ranging from fault-tolerant quantum computing to simulating complex many-body models. ...
Dissipation-driven topological phase transitions in open quantum systems independent of system Hamiltonian
Tian-Shu Deng, Fan Yang·Aug 22, 2025
We investigate dissipation-driven topological phase transitions in one-dimensional quantum open systems governed by the Lindblad equation with linear dissipation operators, which ensure the density matrix retains its Gaussian form throughout the dyna...
Protocol for Purifying Noisy Preparation and Measurements of Qubits
Jaemin Kim, Seungchan Seo, Jiyoung Yun +2 more·Aug 22, 2025
Noise affecting qubit preparation and measurements accounts for a significant fraction of errors in quantum information processing. This is especially critical in tasks like variational quantum algorithms, quantum error correction, and entanglement d...
Automated discovery of heralded ballistic graph state generators for fusion-based photonic quantum computation
Gavin Hartnett, Dave Kielpinski, Smarak Maity +3 more·Aug 22, 2025
Designing photonic circuits that prepare graph states with high fidelity and success probability is a central challenge in linear optical quantum computing. Existing approaches rely on hand-crafted designs or fusion-based assemblies. In the absence o...
Above 99.9% Fidelity Single-Qubit Gates, Two-Qubit Gates, and Readout in a Single Superconducting Quantum Device
F. Marxer, Jakub Mro.zek, J. Andersson +64 more·Aug 22, 2025
Achieving high-fidelity single-qubit gates, two-qubit gates, and qubit readout is critical for building scalable, error-corrected quantum computers. However, device parameters that enhance one operation often degrade the others, making simultaneous o...
Quantum Optimal Control with Geodesic Pulse Engineering
D. Lewis, R. Wiersema, Sougato Bose·Aug 22, 2025
Designing multi-qubit quantum logic gates with experimental constraints is an important problem in quantum computing. Here, we develop a new quantum optimal control algorithm for finding unitary transformations with constraints on the Hamiltonian. Th...
Hamiltonian Simulation for Advection-Diffusion Equation with arbitrary transport field
Niladri Gomes, Gautam Sharma, Jay Pathak·Aug 22, 2025
We present a novel approach to solve the advection-diffusion equation under arbitrary transporting fields using a quantum-inspired'Schrodingerisation'technique for Hamiltonian simulation. Although numerous methods exist for solving partial differenti...